package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;//订单明细Service
    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    @Override
    public void submit(Orders orders) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper =new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper); //查出当前用户的购物车数据

        if(shoppingCarts ==null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }
        //根据用户id查用户信息，订单表要用
        User user = userService.getById(userId);

        //查询地址数据//传过来了 addressbookid
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);//得到地址数据
        if(addressBook ==null ){
            throw new CustomException("用户地址信息有误，不能下单");
        }

        //向订单表插入一条数据

        long orderId = IdWorker.getId(); //订单号,mp中提供了
        orders.setNumber(String.valueOf(orderId));//这个number就是我们的订单号

        //遍历购物车数据 计算总金额（同时为订单明细数据封装
        AtomicInteger amount =new AtomicInteger(0);//原子操作，保证在多线程情况下计算无误
        List<OrderDetail> orderDetails=shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail =new OrderDetail();//订单明细实体
            orderDetail.setOrderId(orderId);//关联订单
            orderDetail.setNumber(item.getNumber());//数量
            orderDetail.setDishFlavor(item.getDishFlavor());//口味
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setNumber(item.getNumber());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());//单份金额
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());//这是一种的总价钱,然后累加起来变成总的金额
            return orderDetail; //   金额  *  分数  再转成 intValue
        }).collect(Collectors.toList());

        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);//2表示待派送
        orders.setAmount(new BigDecimal(amount.get()));//amount 金额
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ?"":addressBook.getProvinceName())
                +(addressBook.getCityName() == null ?"":addressBook.getCityName())
                +(addressBook.getDistrictName() == null ?"":addressBook.getDistrictName())
                +(addressBook.getDetail() == null ?"":addressBook.getDetail()));

        this.save(orders);//此外还要补充其他属性

        //向订单明细表插入数据(一般是多条数据
        orderDetailService.saveBatch(orderDetails);

        //下单完成后，清空购物车数据
        shoppingCartService.remove(wrapper);
    }
}
